Window-screen



(No Model.)

F. WALKER. WINDOW SCREEN.

No. 448,467. Patented Mar. 1'7, 1891.

Ffa

Wifi/wsse@ cgz 40M.

1H: wams reverra co1. mum-umu. wAsHmm-QN, u. c.

yshow its construction more clearly.

UNITED STATES ATnNT Erice.

FRANK VALKER, OF LOS ANGELES, CALIFORNIA.

WINDOW-SCREEN.

SPECIFICATION forming part of Iletters Patent No. 448,467, dated March 17, 1891.

Serial No. 314,551. (No model.)

To all whom t may concern:

Be it known that I, FRANK WALKER, a citizen of the United States, residing` at Los Angeles, in the county of Los Angeles and State of California, have invented certain Improvements in IVindow-Screens, of which the following is a specification.

The object of my invention is to construct alight and strong window-screen of that class in which a movable tongue is held in a groove cut in one of the side bars `of the screen for convenience in placing the screen in or removing it from its position on the Window, as more fully set forth hereinafter.

In the accompanying drawings, Figure 1 is perspective view of a window-frame, showing my improved screen applied thereto. Fig. 2 is an elevation of the screen, one of the side bars being partially broken away in order to Fig. 3 is a sectional plan view of the screen and window-frame. Fig. 4: is a transverse sectional lan view on an enlarged scale of a oortion p J D of the screen on the line l 2, Fig. 2; and Fig. 5 is an elevation of the movable tongue detached from the frame.

The window-frame is of ordinary construction, except that the inner sash-guides A are each provided with a shallow narrow groove a, which may be cut by a saw. The screenframe B is less in width than the space between the guides, and has its opposite side bars C D grooved from end to end, as shown. In one of these grooves is held a ixed tongue b of thin metal, which projects for some distance from the edge of the bar and is adapted to the groove a in one of the sash-guides A. The groove d in the side bar D is of greater depth than that in the side bar C, and seated in said groove is a transversely movable tongue E, formed of a thin strip of metal. This tongue E is provided with a number of transverse slots e, and the side bar D of the frame is provided with a number of screws g of peculiar form, which extend through such slots and form guides for the tongue, allowing it to move transversely to a limited extent, but permitting no longitudinal movement thereof. Secured in the bottom of the groove d are bow-springs 7L, so arranged as to tend to push the movable tongue E from the groove, and to exert their force as evenly as possible along the length of the tongue. When the frame is made, as it preferably is, of very light material, the flanges z', formed by the cutting of the groove d, are neces sarily very thin, and would readily break when subjected to any lateral strain if some practical means of bracing and holding them in their relative position were not provided. I accomplish this strengthening by the use of the peculiar form of screw g, (see Fig. 4,) which is of the same diameter throughout its length, terminating in a pointed end, and is threaded from end to end, as shown, so that when passed through the flangesrlit holds them equidistant, preventing any relative displacement, and keeps them from binding on the metal tongue E.

In placing the screen in position the edge of the metal tongue E is inserted in one of the grooves d in the side bars A and pushed .toward such groove until the tongue is de pressed into its groove CZ a sufficient distance to permit the tongue b to be brought in line with the groove d in the opposite guide-bar A.

Having thus described my invention, I claim and desire to secure by Letters Patentl. The combination, in a window-screen, of the side bar D, having a groove extending its entire length and forming two ribs or flanges, a tongue E, adapted to said `groove and extending the full length of the screen, said tongue having a series of transverse slots, springs in the groove back of the tongue, and a series of combined guideand tie screws the threads of which engage both ribs or flanges, whereby said ribs are held equidistant and against any lateral strain, substantially as specified.

2. The combination, in a window-screen having a fixed tongue on lthe one side and a longitudinal grooved bar D on the opposite side, said groove extending the full length of the bar, a tongue E, adapted to said groove and provided with a series of transverse slots, springs acting on said tongue, a series of screws rigidly secured to the flanges of the grooved' bar and passing through the transits groove d a sufficient distance to allow the fixed tongue to clear its groove d, Substantially as specified. FRANK WALKER. Titnessesz JAMES R. TOWNSEND, ALEXANDER GRANT. 

